Jett? Help!

Hi everyone! I am recently in love with the name Jett, although I don't think we would use it as a first name, I would love to figure out a way to use it as a nickname. Of course we have thought about using it as a middle name and calling him Jett, or even just picking any name, and calling him Jett. But I'd like to see if anyone can come up with a longer name that we could us Jett for short. Hope that made sense! Thanks for the help!

If you're French and Catholic, JeanBaptiste reduces nicely to Jett. Otherwise the obvious choice is Jethro (meh). I'd stick w/Jett or just use any J name you like and nn him Jett regardless of similarity to the name you choose.